RECRYSTALLIZATION OF ACETANILIDE ABSTRACT Recrystallization is the primary method for purifying solid organic compounds through the differences in solubility at different temperatures. In this experiment‚ a suitable solvent was first determined. Acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heating water bath. The hot solution was filtered and the filtrate‚ cooled slowly in an ice bath as crystals started forming
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standardized solution Perform the right titration techniques II. Materials A. Reagents Sodium hydroxide (NaOH) pellets Potassium acid phthalate (HKC8H4O4) Phenolphthalein Soft drinks samples B. Apparatus 250-ml beaker 250-ml Erlenmeyer flask 100-ml volumetric flask 50-ml buret 10-ml pipet buret holder Stirring rod triple beam balance Bunsen burner Iron stand and ring wire gauze III. Schematic diagram of the procedure IV. Data and Observations Table 1.1. Preparation of the Sodium hydroxide
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placed in a commercial blender with about 200 mL of water and ground thoroughly for 5-10 minutes‚ or until all of the leaves are blended. 2. Split the extract into two and filter each using a large Buchner funnel into a 500-mL filter flask. Use additional filter flasks and Buchner funnels as necessary and change the filter paper in the funnel when filtration slows due to clogging. You may need to add excess water to remove all of the spinach remnants from the blender. 3. Meanwhile‚ prepare 375 mL
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Mechanism: Experimental Procedure: (as per lab handout) 1) Add 6 mL of 2-methylcyclohexanol‚ 5 mL of 85% phosphoric acid and a boiling stone to a 25 mL round bottom flask. 2) Set up the flask and also start setting up the distillation
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the graduated cylinder was clamped upside down in the beaker. A rubber stopper with two holes in it was then placed in a 125 mL Erlenmeyer flask. A rubber tube was then inserted into one of the holes of the flask‚ with the other end in the upside down beaker. 20 mL of air was then pumped into the graduated cylinder. About 20 mL of 6 M HCL was then added to the flask. A nail was then inserted into the second hole in the stopper‚ followed by a glass plug. Immediately after the reaction [Zn(s)
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standardized solution Perform the right titration techniques II. Materials A. Reagents Sodium hydroxide (NaOH) pellets Potassium acid phthalate (HKC8H4O4) Phenolphthalein Soft drinks samples B. Apparatus 250-ml beaker 250-ml Erlenmeyer flask 100-ml volumetric flask 50-ml buret 10-ml pipet buret holder Stirring rod triple beam balance Bunsen burner Iron stand and ring wire gauze III. Schematic diagram of the procedure IV. Data and Observations Table 1.1. Preparation of the Sodium hydroxide
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test tube. Record the resultant color for the acid and base. Repeat for the other 4 Acid - Base Indicators PART 2 - ACID/BASE TITRATION PROCEDURE Step 1: Obtain acid‚ in a 100 ml Erlenmeyer flask add 35 ml of an Unknown HCl solution. Step 2: Add an indicator to the acid‚ select the flask and add 2 drops of phenolphthalein indicator. The indicator menu is available under the chemicals main menu (ChemicalsIndicators) or the context menu. Step 3: Fill buret with NaOH‚ obtain a
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Determination of Cobalt Oxalate Hydtrate Introduction The objective of this lab is for students to determine the percentage of cobalt oxalate hydrate using the gravimetric analysis. They will also do a redox titration to determine the percentage of oxalate in the compound. After the percentages are calculated‚ you will determine the percent water by the difference of Oxalate and Cobalt from %100. Procedure Determination of Cobalt 1. Weigh 0.3 g of solid cobalt oxalate hydrate (from lab 8)
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Photochemical Synthesis of Benzopinacol and its Acid-Catalyzed Rerrangement Product Benzopinacolone M.E.G. Balita Institute of Chemistry‚ University of Philippines‚ Diliman‚ Quezon City Date Performed: February 18‚ 2011 Date Submitted: March 4‚ 2011 Abstract In this experiment it is aimed to synthesize benzopinacol through photochemical reaction of benzophenone and‚ benzopinacolone via acid-catalyzed rearrangement of benzopinacol. In this experiment‚ mixture of benzophenone‚ isopropyl
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and sodium hydroxide. Concentrated hydrochloric acid was added to the aqueous extract to lower it to pH 9; it was again extracted with 2 x 30 mL of DCM. These organic extracts were dried over anhydrous magnesium sulfate‚ filtered into a pre-weighed flask and had their
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